Assuntos
Encéfalo/metabolismo , Cálcio/deficiência , Proteínas de Ligação a Calmodulina/metabolismo , Proteínas do Citoesqueleto/metabolismo , Proteínas do Tecido Nervoso/metabolismo , Fenômenos Fisiológicos da Nutrição Pré-Natal , Animais , Encéfalo/embriologia , Encéfalo/crescimento & desenvolvimento , Cálcio da Dieta/metabolismo , Proteínas de Ligação a Calmodulina/genética , Proteínas do Citoesqueleto/genética , Feminino , Masculino , Proteínas do Tecido Nervoso/genética , Gravidez , Ratos , Ratos Endogâmicos SHR , Ratos Endogâmicos WKYRESUMO
We studied the effect of drinking of low mineralized water containing 8 mg/liter Ca2+ on blood pressure and content of brain proteins in synaptosomes of SHR and WKY rats. Blood pressure increased in WKY rats, but not in SHR rats. In SHR rats, Ca2+ deficit reduced the content of GAP-43 protein and induced the appearance of its fragment GAP-43-3 in brain synaptosomes. In WKY rats, the content of this protein did not change, and its fragment GAP-43-3 was absent. No structural changes in BASP1 protein were found.
Assuntos
Pressão Sanguínea/efeitos dos fármacos , Cálcio/deficiência , Proteínas de Ligação a Calmodulina/metabolismo , Proteínas do Citoesqueleto/metabolismo , Proteína GAP-43/metabolismo , Proteínas do Tecido Nervoso/metabolismo , Sinaptossomos/metabolismo , Animais , Feminino , Masculino , Músculo Liso Vascular/metabolismo , Ratos , Ratos Endogâmicos SHR , Ratos Endogâmicos WKY , Sinaptossomos/efeitos dos fármacosRESUMO
Abstract Effects of egg retention on movement and dispersal activity of Trichogramma principium (Hymenoptera, Trichogrammatidae) females were investigated under laboratory conditions. Individual females were observed during one minute in the absence of hosts. Movement activity and dispersal rate were estimated by the length of the track and by the distance from the start point, respectively. Before the test, all wasps during 2 - 4 days were presented with a possibility to parasitize a factitious laboratory host, Sitotroga cerealella Oliv. (Lepidoptera, Gelechiidae). Wasps that had parasitized before the test show significant reduction of spontaneous walking activity and dispersal rate when compared with females that refused to parasitize the non-preferred host (i.e. manifested egg retention). This effect cannot be considered as a direct arrestment reaction to the host because during the test period, no hosts were provided. Thus, egg retention results not only in temporal spread, but also in more intensive spatial dispersal of a group of simultaneously emerged females.
